/* ==========================================================================
   MAYANK MANJUL PORTFOLIO - MAIN CORE STYLESHEET
   High-performance AAA Game Developer HUD / Engine Theme
   ========================================================================== */

:root {
  /* Color Palette - Default Unreal Engine Slate & Cyan */
  --bg-primary: #070a0f;
  --bg-secondary: #0c121d;
  --bg-tertiary: #121c2c;
  --bg-surface: rgba(14, 22, 36, 0.85);
  --bg-surface-elevated: rgba(20, 32, 52, 0.95);
  --bg-card: rgba(16, 26, 44, 0.75);

  --accent-cyan: #00f2fe;
  --accent-cyan-rgb: 0, 242, 254;
  --accent-blue: #4facfe;
  --accent-amber: #ffb800;
  --accent-amber-rgb: 255, 184, 0;
  --accent-emerald: #00f090;
  --accent-emerald-rgb: 0, 240, 144;
  --accent-crimson: #ff3366;
  --accent-crimson-rgb: 255, 51, 102;
  --accent-purple: #9d4edd;

  --theme-accent: var(--accent-cyan);
  --theme-accent-rgb: var(--accent-cyan-rgb);
  --theme-accent-secondary: var(--accent-blue);

  --text-primary: #e6f1ff;
  --text-secondary: #8ba2c4;
  --text-muted: #566b88;
  --text-highlight: #ffffff;

  --border-color: rgba(79, 172, 254, 0.22);
  --border-glow: rgba(0, 242, 254, 0.45);
  --border-subtle: rgba(255, 255, 255, 0.08);

  /* Fonts */
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-display: 'Rajdhani', 'Chakra Petch', sans-serif;
  --font-tech: 'Chakra Petch', 'Rajdhani', sans-serif;
  --font-body: 'Rajdhani', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Spacings & Layout */
  --header-height: 48px;
  --nav-height: 52px;
  --footer-height: 38px;
  --container-max-width: 1360px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base CSS Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

[hidden] {
  display: none !important;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  line-height: 1.6;
  padding-top: calc(var(--header-height) + var(--nav-height));
  padding-bottom: var(--footer-height);
  background: radial-gradient(circle at 50% 20%, #0e192c 0%, #070a0f 75%);
}

/* Selection */
::selection {
  background: var(--theme-accent);
  color: #05080e;
}

/* Typography Defaults */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-highlight);
  text-transform: uppercase;
}

p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

a {
  color: var(--theme-accent);
  text-decoration: none;
  transition: all var(--transition-fast);
}

a:hover {
  color: #ffffff;
  text-shadow: 0 0 10px rgba(var(--theme-accent-rgb), 0.8);
}

code, pre, kbd, samp {
  font-family: var(--font-mono);
}

kbd {
  display: inline-block;
  padding: 2px 6px;
  font-size: 0.75rem;
  line-height: 1;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 3px;
  box-shadow: inset 0 -1px 0 rgba(0,0,0,0.5);
}

/* Background Canvas */
.background-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.75;
}

/* Sections & Main Container */
.hud-main-content {
  position: relative;
  z-index: 2;
  width: 100%;
}

.hud-section {
  padding: 80px 24px;
  position: relative;
  border-bottom: 1px solid var(--border-subtle);
}

.section-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
}

/* Section Headings */
.section-heading {
  margin-bottom: 48px;
  position: relative;
}

.section-index {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--theme-accent);
  letter-spacing: 0.2em;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-index::after {
  content: '';
  display: inline-block;
  width: 40px;
  height: 2px;
  background: var(--theme-accent);
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  letter-spacing: 0.05em;
  margin-bottom: 12px;
  line-height: 1.15;
  background: linear-gradient(135deg, #ffffff 30%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-line {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--theme-accent) 0%, rgba(var(--theme-accent-rgb), 0.1) 60%, transparent 100%);
  margin-bottom: 16px;
}

.section-desc {
  max-width: 800px;
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* Utilities */
.text-cyan { color: var(--accent-cyan) !important; }
.text-amber { color: var(--accent-amber) !important; }
.text-emerald { color: var(--accent-emerald) !important; }
.text-crimson { color: var(--accent-crimson) !important; }

.hide-mobile { display: inline-flex; }
.hide-tablet { display: inline-flex; }

@media (max-width: 900px) {
  .hide-tablet { display: none !important; }
}

@media (max-width: 600px) {
  .hide-mobile { display: none !important; }
  .hud-section { padding: 50px 16px; }
  body {
    padding-top: calc(var(--header-height) + 50px);
  }
}